From a2f9c53f359fd7661641fd57408d8d5004bf5df9 Mon Sep 17 00:00:00 2001
From: Marco Pracucci <marco.pracucci@spreaker.com>
Date: Wed, 25 Jul 2018 10:28:09 +0200
Subject: [PATCH 1/3] Introduced Docker-base development environment

---
 Dockerfile         | 11 +++++++++++
 README.md          |  6 ++++++
 docker-compose.yml | 12 ++++++++++++
 3 files changed, 29 insertions(+)
 create mode 100644 Dockerfile
 create mode 100644 docker-compose.yml

diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..8654362
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,11 @@
+FROM alpine:3.8
+
+# Installing required packages
+RUN apk add --update --no-cache \
+    python3
+
+# Install dependencies
+COPY requirements.txt /workspace/prometheus-jenkins-exporter/requirements.txt
+RUN cd /workspace/prometheus-jenkins-exporter && pip3 install -r requirements.txt
+
+WORKDIR /workspace/prometheus-jenkins-exporter
diff --git a/README.md b/README.md
index 81ded15..42fc553 100644
--- a/README.md
+++ b/README.md
@@ -42,6 +42,12 @@ jenkins_plugins_enabled_with_update_count
 
 ## Contributions
 
+### Run the development environment
+
+```
+docker-compose build && docker-compose run dev sh
+```
+
 ### Ensure the code is PEP 8 compliant
 
 `pycodestyle --max-line-length=180 prometheus_jenkins_exporter/*.py`
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..2808dd1
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,12 @@
+version: "3"
+
+services:
+  dev:
+    build:
+      context:    .
+      dockerfile: Dockerfile
+    command: [ "sh" ]
+    ports:
+      - 8000:8000
+    volumes:
+      - /workspace/prometheus-jenkins-exporter:/workspace/prometheus-jenkins-exporter:delegated

From 3cc420b635d8752dfa532d023b658505869e08b5 Mon Sep 17 00:00:00 2001
From: Marco Pracucci <marco.pracucci@spreaker.com>
Date: Wed, 25 Jul 2018 10:28:31 +0200
Subject: [PATCH 2/3] Added __pycache__/ to .gitignore

---
 .gitignore | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.gitignore b/.gitignore
index 220f18d..8c7a7c7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 dist
 MANIFEST
 prometheus_jenkins_exporter.egg-info
+__pycache__/

From 24568299a6a75e4f154769eab059beaad0333ba8 Mon Sep 17 00:00:00 2001
From: Marco Pracucci <marco.pracucci@spreaker.com>
Date: Wed, 25 Jul 2018 10:29:23 +0200
Subject: [PATCH 3/3] Enabled faulthandler to dump stacktrace to stderr on
 segfault

---
 prometheus_jenkins_exporter/exporter.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/prometheus_jenkins_exporter/exporter.py b/prometheus_jenkins_exporter/exporter.py
index 966f565..aca4110 100644
--- a/prometheus_jenkins_exporter/exporter.py
+++ b/prometheus_jenkins_exporter/exporter.py
@@ -4,6 +4,7 @@
 import time
 import os
 import signal
+import faulthandler
 from urllib.parse import urlencode, quote_plus
 from prometheus_client import start_http_server
 from prometheus_client.core import GaugeMetricFamily, REGISTRY
@@ -11,6 +12,10 @@
 from pythonjsonlogger import jsonlogger
 
 
+# Enable dumps on stderr in case of segfault
+faulthandler.enable()
+
+
 class JenkinsApiClient():
     def __init__(self, config):
         self.config = config